Actions for Interplanetary program to optimize simulated trajectories (IPOST). Volume 4 : Sample cases

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Interplanetary program to optimize simulated trajectories (IPOST). Volume 4 : Sample cases

Author
Hong, P. E.
Published
Oct 1, 1992.
Physical Description
1 electronic document
Additional Creators
Vallado, C. A., Olson, D. W., and Kent, P. D
Online Version

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Restrictions on Access
Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
Summary
The Interplanetary Program to Optimize Simulated Trajectories (IPOST) is intended to support many analysis phases, from early interplanetary feasibility studies through spacecraft development and operations. The IPOST output provides information for sizing and understanding mission impacts related to propulsion, guidance, communications, sensor/actuators, payload, and other dynamic and geometric environments. IPOST models three degree of freedom trajectory events, such as launch/ascent, orbital coast, propulsive maneuvering (impulsive and finite burn), gravity assist, and atmospheric entry. Trajectory propagation is performed using a choice of Cowell, Encke, Multiconic, Onestep, or Conic methods. The user identifies a desired sequence of trajectory events, and selects which parameters are independent (controls) and dependent (targets), as well as other constraints and the cost function. Targeting and optimization are performed using the Standard NPSOL algorithm. The IPOST structure allows sub-problems within a master optimization problem to aid in the general constrained parameter optimization solution. An alternate optimization method uses implicit simulation and collocation techniques.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19930005579.
Accession ID: 93N14768.
NASA-CR-189653-VOL-4.
NAS 1.26:189653-VOL-4.
Terms of Use and Reproduction
No Copyright.
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